Standards defined by the International Organization for Standardization, which are named as ISO + a number. The work of preparing International standards is normally carried out through ISO technical committees. each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote. Publication as an International Standard requires approval by at least 75% of the national bodies casting a vote. Source: International Organization for Standardization, AIIC.